Pumping system



A. PRIESTMAN.

PUMPNG SYSTEM.

A'PPucATloN FILED m11?, 1922.

Patented May 9, 1922.

` soli d matter UNITED sTATss PATENT orties..

ALBERT PRIES'IMAN, OF PHILADIELPIIIA, PEEFINEYLVANIA.

PUMPNG Application filed February `.7, 19223..

.Y o all eti/1mm t may con cera lle it known that l, /irnnnn'r Pniusriuazv, a subject oi the Kinn; ol Great llritain7 re siding` in lfhiladolphin, lcnnsylvania, have invented Piunping Systems, ot which the 'followingr is aspecitication. s

)ne object et this invention is to provide a combination of apparatus which, in addi tion to heineparticularly adapted to oper-- ate on liquids eai'iryiiru` ith there relatively large solid hodies, shall include such an arrangement of parts as will insure the auto matic delivery of such masses ot small solid particles or collections ot semi-solid partie cles as might otherwise clog" up or interfere with the operatiini of the slvstem.

I further desire to provide a system. of the ahove noted type which shall include a .novel torni oi automatically operative screen providing" larger openings or passageways :or material, when this Aflowingr in one direction `than when it is flowing :inthe opposite directionfthe invention es pecially `centen]plating` a novel form of check valve capable of preventi.un1 passage by it oi. liquidcarried solid. bodies when theseare liowing in one direction hut tree to open to allow passage ot the liquid with when the current flow is reversed.

`These objects and other advantageous ends l attain as hereinafter set forth, reference heine' had to the accompanyinir drawings, in which,

Fig. 1 is 4irii'arninatie illustrating a '|iiumping in v invention;

Fig. 2 is a vertical section ot one olf the checli valves iloriningf part of my inventiim;

Fin'. 3 is a plan oit' the valve shown in Fin'. 2; and i I Fig. 4l; is a side elevation oli a modified torni of cheek valve I may use.

In theahove dii'awings I have shown my invention as applied to a pumping system such asis described and claimed in the application for ll. S. patent of l-luhert Beddoes, Serial No. 537,222 ,tiled of even date herewith and in said drawings,1A and 2 represent reversible pi'unping apparatus, shown as two pumps havingr their outlets joined hv a coinluit The inlet ot' the pump l is connected through a pipe 4t with a screen casinp; 5 connected through a ehechr valve 7 with one hranch ot a supply pipe S through au elevatioi'i to seine extent diaand partly in vertical scctioin svsten'i einlu'idyi n g Elpeciiicaten of L ttels Patent.

Patented May 9, 1922.

which liquid carrying .more or ig/arial may he admitted. Said casing1 5 i'oijinh a check valve 9 is connected to a conduit l() deliveringl into a main discharge pipe lli. The second branch ot the supplj;T

pipe il is connected through a check valve .lf3 h a screen casinglfl, which through a conduit l5 is eonnectedto the intake or ycentml opening; ot the second puinp 2. i Said easing; also connected through a checlr relive 1G and conduit l? to the niain discharge conduit ll.

ln each olf the casingrs 5 and 1 4: is nieunted a screen designed to prevent passage oit solid hedies to the punnfiing` apparatus Vfl--l while permitting' tree 'flow ol' such bodies in the opposite direction. For this purpose l.' may einifilov a screen structure i9 ineli'idinn; a plate E2() having;l a numher ot openinns for check valves 2l whose seats `are 'Formed with serrated ednes 2?@ as shown in liigr. El so that itluid may pass from each casingl towards the pumping' airiparatus while the valve acts to hold hack solid fies ii said casing. Suitable cages 23 are provided for the valves.

llniiler conditions of use, when the puinpnur apparatus l-2 is operated in one direction. as hy driviiig the pump l, inaterial such as sewage carrying` solid matter enters threiuh the pipe 8, passes treelv throiurh the check valve 7, Hows through the screen casing' 5, conduit 4h, into the pump l, 'troni whence it passes through the pump E3 into the coi'iduit i5, tliroun'l'i sci'een casii jlfi, lfheiilt valve lli, conduit li' and into the inain djiseharge pipe il. any solid niaterial delivered is caineht hy 'the screen 19, in the easingl so that iteannot pass through the saine. it' desired, the screens ma),T eonoilv or include Hap valves i8 perforated not as desired7 Fin' -f-i, and so mounted that the)7 are held pi 'tiallv open as hv a pin (S when the liquid :tlow is toward the punip i troni the casing; 5 or is toward the punip troni the cas in; 141.-. ds a consequence any solid inatter is arrested and prevented `troni passing to or aceun'iulating in the pumping; apparatus or coi'iduits inuned i atei v adj a ce i i t thereto.

When however a certain amount oit solid nniterial has collected ana-inst or adjaeentthe screen in the easing; :'3 the punipinff apparatus l--- is reversed h v drivingr the punip $2, so that the liquid i'li'iws troni the supply conduit S past the check valve l2 through Cfr screen casing 11i, .conduit l5, pumping apparatus Qml, conduit ll, screen casing 5, checlr valve 9 and conduit l0, to the main discharge pipe l1.

As belfore the solid material from the source is arrested, in this case by the screen in the casing la, so that liquid alone passes to the pumping apparatus 2-1 and this liquid not only carries away to the discharge conduits l@ and ll the solid material which has accumulated in the screen casing 5, but by reason oif the free opening of the Valves 2l in said screen casing, allows the escape of any coagulated or agglomerated matter or particles which may have collected in the pumping apparatus or conduits adjacent thereto. A t the same time the screen 19 in the casing lll allows liquid only to liow to the pumping apparatus so that when the latter is again reversed, the solid matter which has accumulated in the casing 14e is discharged and the screen in said casing is swept clean of any solid accumulations, since its valves 2l or 18 open as before, to pass any solid material which may have accumulated or termed in the pumping apparatus or its associated conduits.

From the above description it will be seen that not only is my system particularly adapted for propelling from a source to a point of discharge liquids carrying solid material which would otherwise injure or interferewit-h the operation of the pump, but in addition, by reason of the peculiar automatically acting screens described, the discharge of solid matter from the pumping apparatus itselt1 is insured. This is particularly advantageous and occurs regardless of the direction of flow of the liquid, since otherwise there is a possibility that solid material might accumulate or form in the pumping apparatus and conduits back et the screens and interfere with the desired operation and efficient :functioning olf the system.

l claim:

l. The combination in a pumping system of a reversible pumping apparatus and at least one screen for normally preventing the passage of solid material to said apparatus, said screen including means 'for automatically permitting ifree passage ot solid material from the pumping apparatus.

2. The combination in a pumping system oit a reversible pumping apparatus and a screen associated therewith including means for providing larger openings ior the passage ot material when the low is away :from the apparatus than when it is toward the same.

The combination in a pumping system of a reversible pumping apparatus; two screen casings connected between said appa ratus and a source of supply of solid-carrying liquid; discharge conduits connected to said screen casings; and screens in said casings -formed to provide relatively larger openings for the passage of material away from the pumpin Y apparatus than are providedl for the passage et liquid to the said apparatus.

Ll. The combination in a pumping system oi' a reversible pumping apparatus; two screen casings connected between said apparatus and a source of supply of solid-carrying liquid; discharge conduits connected to said screen casings; and screens in said casing` including check valves mounted to provide relatively small passages when the flow occurs toward the pumping apparatus but free to open when the flow is away from said apparatus.

ALBERT PRIESTM A N.

Crt 

